Yep I'm new. I am trying to figure out how to get sendmail setup to allow receipt and send out to mail to dynamically assigned domain. I use comcast for my provider, and have a dyip domain. I cant find any references for what it is I want to do. How does one get mail sent to a dynamically assigned domain and sent out again witth the headers saying the dynamically assigned domain name?
IE: my ip is assigned through Comcast, but I have a hostname of blah-blah.ath.cx.
Can this be done? If so is there a reference or something you can point me to to accomplish this?
Thanks

but you domain name isn't dynamic... your IP is, but the point of dynip or whateer is that you have a fixed domain name you can always call home, so you should be able to just use that domain name, which will always get resolved to a suitable domain name by dynip's DNS servers.

So as long as my ISP allows traffic on port 25 I "should" be able to configure it all and have it work?

comcast does. I had comcast for years. They don't give a damn if you run the worlds biggest mail server, i just don't reccomend running a massive FTP. That tends to irritate people. :P

well yes, as far as incoming smtp traffic goes, any mail will be told to head in your direction, whatever the IP. and any relay rules you setup can be noramlly based on the name, no IP required

Hmmm
Now I just need to decide on whether or not to use sendmail or qmail, and figure out how to get my hostname on the box to match the one i have assigned through dyndns...ahh more reading...
Any tips?


Thanks for the feedback so far it is much appreciated.

i wouldnt use sendmail just because of the many bad things i've heard about it. i use postfix myself. seems easier to setup than sendmail and is more secure i think. dont know much about qmail tho.

the hostname part is unimportant but the hostname command usually works:

#hostname newhostnamehere